Rotating Machine Casing Plating via Liquid Level Control
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Solution Overview
Problem
The existing plating methods for rotating machine casings, which eliminate the need for large plating tanks, result in uneven contact times of plating liquids with the casing surfaces, leading to reduced plating quality.
Innovation Solution
A manufacturing method that involves a casing with multiple openings for supplying and discharging pretreatment, preheating, and plating liquids, using a treatment liquid auxiliary supply device to adjust liquid levels and ensure uniform contact time across the inner surface, eliminating the need for immersion tanks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large plating tank is used to immerse the casing, then uniform plating quality is achieved, but manufacturing costs increase
Solution Approach 1:
The invention divides the plating process into multiple stages (pretreatment, preheating, plating) with multiple openings for liquid supply and discharge. This segmentation allows controlled liquid flow through the casing without requiring a large immersion tank, achieving uniform plating while reducing equipment costs
Solution Approach 2:
The invention introduces a treatment liquid auxiliary supply device as an intermediary to control the supply and discharge of liquids through multiple openings in the casing. This mediator ensures uniform contact time of plating liquid with the inner surface without requiring complete immersion, resolving the contradiction between plating quality and manufacturing cost
2Ease of manufacture
If plating liquid is supplied and discharged through openings without a plating tank, then manufacturing costs are reduced, but liquid contact time becomes uneven across the inner surface
Solution Approach 1:
The invention applies local quality by providing multiple supply openings and discharge openings at different locations on the casing. This allows different regions of the inner surface to receive plating liquid at appropriate times, ensuring uniform contact time and plating quality without requiring a large immersion tank
Solution Approach 2:
The invention uses a treatment liquid auxiliary supply device that dynamically controls the supply and discharge of liquids through multiple openings. This dynamic control ensures that plating liquid contacts different regions of the inner surface uniformly, maintaining plating quality while avoiding the need for expensive immersion tanks
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures uniform plating quality while reducing costs by optimizing liquid contact times and eliminating the requirement for large plating and preheating tanks.
Implementation Method 1
a surface activating process of supplying a pretreatment liquid into the casing through the openings, then discharging the pretreatment liquid from the casing through the openings, and activating an inner surface of the casing
Implementation Method 2
a preheating process of supplying a preheating liquid into the casing through the openings, then discharging the preheating liquid from the casing through the openings, and preheating the casing
Implementation Method 3
preheating the casing after the surface activating process
Implementation Method 4
a plating process of performing supply and discharge of a plating liquid into and from the casing through the openings to circulate the plating liquid and plating the inner surface of the casing
Data Source
AI summary
A manufacturing method of a rotating machine (100) includes: a casing forming process (S0) of forming a casing (1) of the rotating machine (100) having openings (5, 6, 10, 11) and suctioning and discharging a fluid (F); a surface activating process (S2) of supplying and discharging a pretreatment liquid (W1) into and from the casing (1) through the openings (5, 6, 10, 11) and activating an inner surface (1a) of the casing (1); a preheating process (S4) of supplying and discharging a preheating liquid (W2) into and from the casing (1) through the openings (5, 6, 10, 11) and preheating the casing (1); a plating process (S5) of supplying and discharging a plating liquid (W3) into and from the casing (1) through the openings (5, 6, 10, 11), and circulating the plating liquid to plate the inner surface (1a) of the casing (1); and an assembling process (S7) of providing a rotating body (3, 4) such that the rotating body is covered from an outer peripheral side by the plated casing (1). In the surface activating process (S2), the preheating process (S4), and the plating process (S5), when the liquid level of each of the liquids used in each process is vertically changed in the casing (1), each of the liquids is supplied to the inner surface (1a) of the casing (1) in a range above the liquid level by a treatment liquid auxiliary supply device (18).